Model Comparison

Claude Sonnet 4.5 vs GPT-4 Turbo

Claude Sonnet 4.5 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Sonnet 4.5 outperforms in 1 benchmarks (GPQA), while GPT-4 Turbo is better at 0 benchmarks.

Claude Sonnet 4.5 significantly outperforms across most benchmarks.

Thu Apr 30 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Cost data unavailable.

Lowest available price from all providers
Thu Apr 30 2026 • llm-stats.com
Anthropic
Claude Sonnet 4.5
Input tokens$0.00
Output tokens$0.00
Best providerUnknown Organization
OpenAI
GPT-4 Turbo
Input tokens$10.00
Output tokens$30.00
Best providerAzure
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Context Window

Maximum input and output token capacity

Only GPT-4 Turbo specifies input context (128,000 tokens). Only GPT-4 Turbo specifies output context (4,096 tokens).

Anthropic
Claude Sonnet 4.5
Input- tokens
Output- tokens
OpenAI
GPT-4 Turbo
Input128,000 tokens
Output4,096 tokens
Thu Apr 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Sonnet 4.5 supports multimodal inputs, whereas GPT-4 Turbo does not.

Claude Sonnet 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Sonnet 4.5

Text
Images
Audio
Video

GPT-4 Turbo

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Sonnet 4.5

Proprietary

Closed source

GPT-4 Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Sonnet 4.5 was released on 2025-09-29, while GPT-4 Turbo was released on 2024-04-09.

Claude Sonnet 4.5 is 18 months newer than GPT-4 Turbo.

Claude Sonnet 4.5

Sep 29, 2025

7 months ago

1.5yr newer
GPT-4 Turbo

Apr 9, 2024

2.1 years ago

Knowledge Cutoff

When training data ends

Claude Sonnet 4.5 has a knowledge cutoff of 2025-01-31, while GPT-4 Turbo has a cutoff of 2023-12-31.

Claude Sonnet 4.5 has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to GPT-4 Turbo (2023-12-31).

Claude Sonnet 4.5

Jan 2025

1.1 yr newer
GPT-4 Turbo

Dec 2023

Outputs Comparison

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Key Takeaways

Anthropic
Supports multimodal inputs
Higher GPQA score (83.4% vs 48.0%)
OpenAI
Larger context window (128,000 tokens)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Sonnet 4.5
OpenAI
GPT-4 Turbo

FAQ

Common questions about Claude Sonnet 4.5 vs GPT-4 Turbo

Claude Sonnet 4.5 significantly outperforms across most benchmarks. Claude Sonnet 4.5 is made by Anthropic and GPT-4 Turbo is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Claude Sonnet 4.5 scores MMMLU: 89.1%, AIME 2025: 87.0%, TAU-bench Retail: 86.2%, GPQA: 83.4%, MMMUval: 77.8%. GPT-4 Turbo scores MGSM: 88.5%, HumanEval: 87.1%, MMLU: 86.5%, DROP: 86.0%, MATH: 72.6%.
Claude Sonnet 4.5 supports an unknown number of tokens and GPT-4 Turbo supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.
Claude Sonnet 4.5 is developed by Anthropic and GPT-4 Turbo is developed by OpenAI.